Django-popolo

* Raise an error on (rather than silenty ignore) inline
areas without an 'id' attribute in the importer.
* Fix the import of areas with parents.
* Don't error if a source or link is missing 'note'.

* Many improvements to the code that imports from Popolo JSON
* Fix the migrations for Python 2 (wfdd)

* Sync with upstream (at 3a34d5cb, plus PR 28).

* Python 3 compatibility changes (James McKinney).

* Initial release of fork on PyPI. The only difference with upstream is the
removal of slugs and autoslug, so something using this app can decide how
it handles them.


Changelog
All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).

[Unreleased]

Changed
- internal areas added to choices in Area and AreaRelationship models